. brian. >> reporter: right. the atherton police notified the fbi because of the threatening nature of the graffiti in spray-paint aimed at the richest of the rich. atherton, california, big homes, tall fences and now offensive graffiti. >> it's terrible. yeah. it's a terrible thing to do and to be here in town. >> reporter: a week ago sunday evening, vandals armed with spray cans cut a path through the posh part of town covering houses, fences and even a car and what they left behind weren't exactly works of art. the spray-painted message was almost always the same. i can't repeat the word that was used. but the target was the 1%. >> we go out and collect evidence, uhm, we interview neighbors. we look for anything we can that can point us in the direction of the people that did this. >> reporter: one of the writings had a more threatening tone, kill people. neighbors are on the fence about who did it. "occupy" protestors, gang members or teens with time to kill. >> i don't have this generation of child, i can't imagine this generation doing that. it's somebody with an axe to grind.